WO2006006292A1

WO2006006292A1 - Gravure printing press and process for fabricating multilayer ceramic electronic component

Info

Publication number: WO2006006292A1
Application number: PCT/JP2005/007889
Authority: WO
Inventors: Hiroyoshi Takashima; Akira Hashimoto; Kazuhiro Tabata; Yoshihiro Kanayama; Takashige Tanabe
Original assignee: Murata Manufacturing Co., Ltd.
Priority date: 2004-07-08
Filing date: 2005-04-26
Publication date: 2006-01-19
Also published as: US20090022882A1; TW200840710A; CN104589781A; JPWO2006006292A1; TW200613145A; TWI332438B; TWI309203B; US7950326B2; KR20080042903A; KR100847663B1; KR100847664B1; JP4042801B2; TW200840711A; US20070107611A1; TWI332437B; CN1980799A; CN1980799B; KR20080042904A; US7481162B2

Abstract

A gravure printing press capable of forming a conductive paste film exhibiting excellent smoothness by gravure printing. In a printing area (13) formed on the circumferential surface of a gravure roll (2), a plurality of cells (17) are formed by being sectioned by a printing direction bank (15) and a vertical direction bank (16), and a plurality of cuts (18) are provided in the vertical direction bank (16). In the central part of the printing area (13), the intersecting part of the printing direction bank (15) and the vertical direction bank (16) are substantially composed of a T-shaped intersecting part (19) wherein the vertical direction bank (16) does not penetrate but intersects the printing direction bank (15) in T-shape. Preferably, the corner part where a part of the printing direction bank (15) intersects a part of the vertical direction bank (16) and the forward end part of the vertical direction bank (16) directing the cut (18) are beveled by rounding.

Description

Specification

Gravure printing machine and manufacturing method of multilayer ceramic electronic component

Technical field

TECHNICAL FIELD [0001] The present invention relates to a gravure printing machine and a method for manufacturing a multilayer ceramic electronic component carried out using the same, and more particularly to a technique for improving the smoothness of a paste film formed by gravure printing. Is.

Background art

In order to manufacture a multilayer ceramic electronic component such as a multilayer ceramic capacitor, for example, a process of forming a conductive paste film serving as an internal electrode on a ceramic green sheet is performed. The internal electrode provided by this conductive paste film is required to have high pattern accuracy. Gravure printing is attracting attention as a technology that can satisfy this requirement (for example, see Patent Document 1).

[0003] In Patent Document 1, for the purpose of uniformizing the thickness at the outer peripheral portion of a paste film formed by gravure printing, an image line to which a printing paste is applied is formed on the peripheral surface of the gravure roll. For a plurality of cells formed in the area, the cell opening area in the outer peripheral part is made smaller than the cell opening area in the central part, and the cell depth in the outer peripheral part is set to a cell depth in the central part. The depth shallower than the depth of is described.

[0004] However, since the cells described in Patent Document 1 are independent of each other, the ratio of the area of the cell portion to the area of the entire image portion is compared. In addition, since printing paste cannot flow between adjacent cells during printing, it is particularly unsuitable for printing to form a paste film having a relatively large area, resulting in uneven printing. Cheap.

[0005] Although not intended to be applied in the field of electronic components as a solution to the above-mentioned problems, a bank that defines a plurality of cells formed in the image line portion is connected to the printing direction. In order to place the cells so as to extend diagonally and to connect the cells between adjacent ones, there has been proposed one in which a notch is provided in the bank that partitions each cell (see, for example, Patent Document 2). ). [0006] According to the technique described in Patent Document 2 described above, the ratio of the area of the area (that is, the cell and the notch) that can hold the print paste to the area of the entire image area can be increased. In addition, the flow of the printing paste through the notch can be expected.

[0007] However, in the technique described in Patent Document 2, it is an essential requirement that the notch interval be smaller than the width of the bank. When a high printing paste is used, the flow of the printing paste between adjacent cells is limited. As a result, traces of cells may remain in the printed paste film, or a smooth paste film may not be formed.

[0008] Further, in the technique described in Patent Document 2, the banks that define a plurality of cells formed in the image line portion are arranged so as to extend obliquely with respect to the printing direction. The so-called thread pulling force of the printing paste when the printing sheet is also separated from the gravure roll force. Local unevenness is likely to occur.

[0009] Further, even if the above-described stringing occurs in an oblique direction with respect to the printing direction, the direction is not constant! May join together. This causes variations in the thickness of the paste film.

Patent Document 1: Japanese Patent Laid-Open No. 9-76459

Patent Document 2: Japanese Utility Model Publication 5-41015

Disclosure of the invention

Problems to be solved by the invention

[0010] Therefore, an object of the present invention is to provide a gravure printing machine and a method for manufacturing a multilayer ceramic electronic component implemented using the same that can solve the above-described problems.

Means for solving the problem

The present invention is first directed to a gravure printing machine for forming a paste film on a printing sheet by gravure printing.

[0012] This gravure printing machine includes a gravure roll in which an image line portion to which a printing paste for providing a paste film is applied is formed on the peripheral surface thereof. [0013] A gravure printing machine having such a configuration is characterized by having the following configuration in order to solve the technical problems described above.

[0014] That is, the image portion is provided with a printing direction bank extending substantially in the printing direction and a vertical bank extending substantially perpendicular to the printing direction bank, and is divided by the printing direction bank and the vertical bank. A plurality of cells are formed. In order to make the cells adjacent to each other in the printing direction communicate with each other, a notch is provided in the vertical bank. Furthermore, the printing direction bank and the vertical direction bank form an intersecting portion that intersects each other, and this intersecting portion intersects the T shape without the vertical bank penetrating the printing direction bank. Includes an intersection.

[0015] As described above, the direction in which the printing direction bank extends is substantially the printing direction, and the direction in which the vertical direction bank extends is substantially perpendicular to the printing direction bank, respectively, This is because there is an allowable range of about ± 5 degrees with respect to the vertical direction.

[0016] It is preferable that the above-described T-shaped intersections are distributed at least in the center of the image area. In this case, it is preferable that more than half of the intersections located at the center of the image line part are T-shaped intersections. Most preferably, all the intersections located in the center of the image area are T-shaped intersections.

[0017] It is preferable that a corner portion where a part of the printing direction bank and a part of the vertical bank intersect each other is rounded or chamfered by a slope.

[0018] In the central portion of the image line portion, it is preferable that the above-described notch interval is larger than the widths of the printing bank and the vertical bank.

[0019] It is preferable that the tip of the vertical bank facing the notch is rounded or chamfered by a slope.

[0020] The bank in the printing direction is preferably provided so as to extend substantially continuously from the printing start end to the printing end in the image line portion. It should be noted that the printing direction bank may extend substantially continuously if the printing direction bank may be interrupted at several points in the middle, for example, a groove may be formed at the beginning and end of printing. Yo, that means.

[0021] It is preferable that the aforementioned notches adjacent to each other in the printing direction have different positions in the direction perpendicular to the printing direction. In this case, the notch is a pair of cells. It is more preferable to be located at the two corners facing each other in the direction of the angle.

[0022] The gravure printing machine according to the present invention is particularly preferably used for producing a multilayer ceramic electronic component. In this case, it becomes a paste film formed by a patterned layer force gravure printing machine that forms a part of the multilayer structure provided in the multilayer ceramic electronic component. Therefore, the present invention is also directed to a method for manufacturing a multilayer ceramic electronic component that is carried out using the gravure printing machine as described above.

[0023] In the method for manufacturing a multilayer ceramic electronic component according to the present invention, it is preferable that gravure printing is used to form a conductive paste film to be an internal electrode. That is, it is preferable that a conductive paste is used as the above-described printing paste, and the paste film formed by the printing paste is a conductive paste film serving as an internal electrode.

[0024] In the above case, the above-mentioned printing sheet is preferably a ceramic green sheet. Further, the printing sheet may be a resin sheet such as a carrier film.

The invention's effect

As described above, according to the gravure printing machine according to the present invention, the image line portion formed on the peripheral surface of the gravure roll is provided with the printing direction bank and the vertical direction bank, and the printing direction. Notches are provided in the vertical bank in order to establish communication between adjacent cells partitioned by the bank and the vertical bank, so that, for example, metal content can be compared as a printing paste. Therefore, even if a conductive paste with a relatively high viscosity is used, the printing paste can flow well between adjacent cells, resulting in gravure printing. The unevenness on the surface of the paste film can be reduced, and the thickness of the paste film can be made uniform.

[0026] Further, since the bank in the printing direction extends substantially in the printing direction, the threading direction of the printing paste when the sheet to be printed leaves the gravure roller is substantially limited to the printing direction, and in the oblique direction. Must not. This also contributes to making the thickness of the paste film formed by gravure printing uniform, and causes local irregularities that may occur in the peripheral shape of the printed paste film. can do.

[0027] Further, the printing direction bank and the vertical direction bank form an intersecting portion that intersects each other, and the intersecting portion does not penetrate the vertical direction bank with respect to the printing direction bank (that is, Because it includes a T-shaped intersection that intersects in a T-shape (rather than a cross-shaped intersection), when compared within the same area, the number of intersections compared to the case of only a cross-shaped intersection Can be increased. As a result, the distribution of the openings provided by each cell can be made more uniform. This also contributes to smoothing the surface of the paste film formed by gravure printing. This is a force that can reduce the probability that stringing that occurs at multiple locations will merge together.

[0028] The effect of the above-described crossed-curved portion is more reliably exhibited when the crossed-crossed portion is distributed at least in the central portion of the image portion. In order to exhibit the effect of the τ-shaped intersection more reliably, it is more preferable that more than half of the intersections located in the center of the image line portion are τ-shaped intersections. This is when the intersections located at the center of the line are all τ-shaped intersections.

[0029] If the corner where the part of the printing bank and the part of the vertical bank intersect each other is rounded or chamfered by a slope, the printing paste is used between adjacent cells. Can be made to flow more satisfactorily and the flow of stringing can be made smoother. As a result, it is possible to contribute to further smoothness of the paste film formed by gravure printing. The effect of facilitating cleaning of the image area can also be expected.

[0030] If the notch spacing is larger than the widths of the printing direction bank and the vertical direction bank in the center of the image line part, the printing paste may flow better between adjacent cells. it can. Therefore, this also contributes to make the thickness of the paste film formed by gravure printing uniform.

[0031] When the tip of the vertical bank facing the notch is rounded or chamfered by a slope, the part of the corner where the above-mentioned printing bank and the vertical bank intersect each other As in the case of chamfering by rounding or beveling in the printing, the printing best can be made to flow better between adjacent cells, and the stringing flow can be made smoother. As a result, it is possible to contribute to further smoothness of the paste film formed by gravure printing.

[0032] In the gravure printing machine according to the present invention, the printing direction bank is used for printing in the image area. If it is provided to extend substantially continuously from the beginning to the end of printing, the printing paste will flow in the printing direction only within the area surrounded by the bank in the printing direction. The effect of suppressing the occurrence of is great. Therefore, the thickness of the paste film formed by gravure printing can be made more uniform.

[0033] Further, if the positions of the notches adjacent to each other in the printing direction are different from each other in the direction perpendicular to the printing direction, the notches are more preferably opposed to the diagonal direction of each cell. If it is located at one corner, when the excess printing paste on the circumference of the gravure roll is scraped off by the blade, it will undesirably roll out to the printing paste that should remain in each cell. Therefore, it is possible to advantageously prevent the paste film from being partially thinned. In addition, the stringing of the printing paste when the printing sheet is separated from the gravure roll force proceeds continuously through the notches. Therefore, as described above, the positional force of the notches adjacent to each other suppresses the unevenness on the surface of the paste film that may be generated by the thread bow I of the printing paste when shifted in the direction perpendicular to the printing direction. can do.

[0034] From the above, the characteristics of the obtained multilayer ceramic electronic component can be stabilized if applied to the production of the multilayer ceramic electronic component using the gravure printing machine as described above. At the same time, the occurrence of defective products can be suppressed and the manufacturing yield can be improved.

[0035] In particular, if the conductive paste film serving as the internal electrode provided in the multilayer ceramic electronic component is formed by the gravure printing machine according to the present invention, the thickness of the conductive paste film can be made uniform. Therefore, it is possible to prevent the obtained multilayer ceramic electronic component from causing a short circuit failure or a defective insulation resistance. Brief Description of Drawings

FIG. 1 is a front view schematically showing a gravure printing machine 1 according to a first embodiment of the present invention.

[FIG. 2] FIG. 2 shows a case where a conductive paste film 9 is formed on a ceramic green sheet 8 lined with a carrier film 10 as a printing sheet 3 by the gravure printing machine 1 shown in FIG. It is sectional drawing which shows the formed state.

FIG. 3 is a perspective view showing the gravure roll 2 shown in FIG. 1 alone.

[FIG. 4] FIG. 4 is a developed view of the peripheral surface of the gravure roll 2, showing an enlargement of one image line portion 13 shown in FIG. 3.

FIG. 5 is a diagram showing a part of the image line portion 13 shown in FIG. 4 in a further enlarged manner.

FIG. 6 is a view corresponding to a part of FIG. 5 for describing a second embodiment of the present invention.

FIG. 7 is a view corresponding to FIG. 5 for explaining a third embodiment of the present invention.

FIG. 8 is a view corresponding to FIG. 5 for explaining a fourth embodiment of the present invention.

FIG. 9 is a view corresponding to FIG. 5 for describing a fifth embodiment of the present invention.

FIG. 10 is a view corresponding to FIG. 5 for explaining a sixth embodiment of the present invention.

FIG. 11 is a view corresponding to FIG. 4 for describing a seventh embodiment of the present invention.

Explanation of symbols

1 Gravure printing machine

2 Gravure Ronole

3 Printed sheet

8 Ceramic green sheet

9 Conductive paste film

12 Conductive paste

13 Stroke section

15 Print direction bank

16 Vertical bank

17 cells

18, 18a cutout

19 T-shaped intersection

20, 21 Rounded chamfer 25, 26 Chamfer by slope

29 Cross intersection

BEST MODE FOR CARRYING OUT THE INVENTION

The gravure printing machine 1 includes a gravure roll 2 and an impression cylinder 4 that faces the gravure roll 2 with the printing sheet 3 interposed therebetween. The gravure roll 2 and the impression cylinder 4 rotate in the directions of arrows 5 and 6, respectively, whereby the printing sheet 3 is conveyed in the direction of arrow 7. There may be a gravure printing machine that does not include an impression cylinder, as in the case of a gravure lithographic printing machine.

The gravure printing machine 1 is used for manufacturing a multilayer ceramic electronic component such as a multilayer ceramic capacitor. More specifically, the gravure printer 1 forms a paste film to be a patterned layer that forms a part of a multilayer structure provided for the multilayer ceramic electronic component on the printed sheet 3 by gravure printing. Used in More specifically, as shown in FIG. 2, a conductive paste film 9 to be a patterned internal electrode is formed on the ceramic green sheet 8 by gravure printing.

[0041] The ceramic green sheet 8 is backed by a carrier film 10 as shown in FIG. Therefore, the printed sheet 3 shown in FIG. 1 is a ceramic green sheet 8 backed by the carrier film 10 in this way.

As shown in FIG. 1, the gravure roll 2 is immersed in a conductive paste 12 accommodated in a tank 11, thereby forming a plurality of images formed on the peripheral surface of the gravure roll 2. A conductive paste 12 is applied to the line portion 13 (part of which is schematically shown). Details of the image line unit 13 will be described later. The supply of the conductive paste 12 to the gravure roll 2 may be performed by a method such as injecting the conductive paste 12 to the gravure roll 2 by force. Excess conductive paste 12 on the peripheral surface of the gravure roll 2 is scraped off by the doctor blade 14.

The image line portion 13 has a pattern corresponding to the pattern of the conductive paste film 9 shown in FIG. 2, as only a representative one is schematically shown in FIG. The This implementation In the form, the longitudinal direction of the image portion 13 is directed to the circumferential direction of the gravure roll 2

FIG. 4 is a developed view of the peripheral surface of the gravure roll 2, showing an enlarged view area 13.

In FIG. 4, the printing direction is indicated by an arrow. This printing direction corresponds to the arrow 5 shown in FIG. More specifically, the upper end side in FIG. 4 of the image line portion 13 is the printing start end side, and the lower end side is the printing end side. Accordingly, in the printing process, the area of the image line portion 13 that contacts the printing sheet 3 changes its position on the upper end side force in FIG. 4 to the lower end side.

The image line unit 13 is provided with a plurality of printing direction banks 15 extending in the printing direction and a plurality of vertical direction banks 16 extending in a direction perpendicular to the printing direction bank 15. Then, a plurality of cells 17 partitioned by the printing direction bank 15 and the vertical direction bank 16 are formed.

Looking at the opening area of each of the plurality of cells 17 as described above, the cell 17 (A) located at the periphery of the image line portion 13 is the cell 17 ( It is smaller than B). In order to reduce the opening area of the cell 17 (A) located at the peripheral edge, the portion located at the peripheral edge of the image line portion 13 of each of the printing direction bank 15 and the vertical direction bank 16 is compared with the other portions. The width has been made larger. By adopting such a configuration, the so-called “saddle phenomenon” described below can be caused.

[0047] Generally, when a paste film is formed by applying gravure printing, a so-called saddle phenomenon in which the peripheral portion of the paste film becomes thicker than the central portion is likely to occur. When a multilayer ceramic electronic component is manufactured using a conductive paste film in which such a “saddle phenomenon” occurs, a short circuit failure or a structural defect may be caused. The configuration as described above is effective in suppressing the “saddle phenomenon”.

FIG. 5 is a view showing a part of the image line unit 13 shown in FIG. 4 further enlarged.

[0049] As shown in Figs. 4 and 5, the vertical bank 16 is provided with a notch 18, whereby the cells 17 adjacent in the printing direction are in communication with each other. In this embodiment, the vertical bank 16 extends intermittently with a notch 18 in the direction perpendicular to the printing direction. [0050] The printing direction bank 15 and the vertical direction bank 16 form an intersecting portion intersecting each other. In this embodiment, the intersecting portion constitutes a T-shaped intersecting portion 19 where the vertical bank 16 intersects in the T shape without penetrating the printing direction bank 15. Furthermore, in this embodiment, all the intersections are T-shaped intersections 19 in this embodiment.

[0051] Further, as well shown in FIG. 5, the corner portion where a part of the printing bank 15 and a part of the vertical bank 16 intersect each other in the T-shaped intersection 19 is rounded. A chamfer 20 is attached. In addition, the notch 18 is also chamfered 21 by rounding at the tip of the vertical bank 16 in the direction of the vertical force.

[0052] Although not adopted in this embodiment, even when the vertical bank 16 is formed so as to penetrate the printing bank 15 and forms a cross-shaped crossing portion, Such chamfering is preferably applied.

As shown in FIGS. 4 and 5, in the central portion of the image line portion 13, the interval between the notches 18 is larger than the widths of the printing bank 15 and the vertical bank 16. For example, the width of the printing bank 15 and the vertical bank 16 is 5 to 20 m, while the interval between the notches 18 is 20 to 40 μm.

[0054] By adopting these configurations, the conductive paste 12 (see Fig. 1) having a high viscosity, such as 0.1 to 40 Pa, s, compared to general gravure ink, A constant flow is smoothly generated in the printing direction, and a smooth surface and uniform thickness can be reliably obtained in the conductive paste film 9.

As shown in FIG. 4, each printing direction bank 15 extends substantially continuously from the printing start end to the printing end in the image line portion 13.

[0056] By adopting such a configuration, the conductive paste 12 can smoothly flow between the adjacent cells 17, so that the conductive paste 12 can flow uniformly in the printing direction. In addition, the so-called stringing of the conductive paste 12 when the printing sheet 3 is separated from the gravure roll 2 is generated obliquely by the force S that is not regulated in the printing direction, as indicated by the broken arrow 22 in FIG. It is possible to create local irregularities in the peripheral shape of the printed conductive paste film 9 (see Fig. 2).

[0057] The notches 18 adjacent to each other in the printing direction are perpendicular to the printing direction. The positions in are different from each other. In particular, in this embodiment, the notches 18 are located at two corner portions of each cell 17 that are opposite to each other in the diagonal direction.

[0058] By adopting such a configuration, when the excess conductive base 12 on the peripheral surface of the gravure roll 2 is scraped off by the doctor blade 14, undesirably in each cell 17 Therefore, it is possible to advantageously prevent the conductive paste film 9 from being partially thinned.

Further, the stringing of the conductive paste 12 when the printing sheet 3 is separated from the gravure roll 2 proceeds continuously via the notch 18. Therefore, the positional force of the notches 18 adjacent to each other, as described above, on the surface of the conductive paste film 9 that can be generated by stringing of the conductive paste 12 when shifted in the direction perpendicular to the printing direction. You can suppress unevenness.

[0060] If the conductive paste film 9 is formed by the gravure printing machine 1 having the above-described configuration, the conductive paste film 9 is smooth over the entire surface and is excellent in the linearity of the outer peripheral contour. Can be.

[0061] After the ceramic green sheet 8 on which the conductive paste 9 as shown in Fig. 2 is formed is obtained using the gravure printing machine 1, a plurality of ceramic green sheets 8 are laminated and pressure-bonded. Are cut and then fired to obtain a multilayer structure that becomes a component body for the multilayer ceramic electronic component. In this laminated structure, the conductive paste film 9 described above constitutes an internal electrode. Next, if necessary, external electrodes and the like are formed on the outer surface of the multilayer structure, thereby completing a desired multilayer ceramic electronic component.

[0062] In such a multilayer ceramic electronic component, as described above, since the conductive paste film 9 is formed smoothly over the entire surface, stress is not concentrated locally in the crimping process. When contact is made through the ceramic layer, it is possible to prevent the occurrence of short-circuit failure or the occurrence of insulation resistance failure due to local thinning of the ceramic layer.

FIG. 6 is a view corresponding to a part of FIG. 5 for explaining the second embodiment of the present invention. In FIG. 6, elements corresponding to those shown in FIG. A duplicate description is omitted.

In the second embodiment shown in FIG. 6, a chamfered surface by a slope is formed at a corner portion where a part of the printing bank 15 and a part of the vertical bank 16 intersect each other in the T-shaped intersection 19. 2 and 5 are attached, and the notch 18 is characterized in that a chamfer 26 is attached to the tip of the vertical bank 16 by a slope. These chamfered chamfers 25 and 26 perform the same functions as the chamfered chamfers 20 and 21 in the first embodiment.

FIGS. 7 and 8 are diagrams corresponding to FIG. 5 for describing the third and fourth embodiments of the present invention, respectively. 7 and 8, elements corresponding to those shown in FIG. 5 are given the same reference numerals, and redundant descriptions are omitted.

In the first embodiment shown in FIG. 5, the planar shape of the cell 17 is substantially square, whereas in the third embodiment shown in FIG. 7, the cell 17 has a printing direction. In the fourth embodiment shown in FIG. 8, the cell 17 has a long rectangular planar shape in a direction perpendicular to the printing direction. Regarding the features other than the planar shape of the cell 17, the third and fourth embodiments have the same features as the first embodiment.

FIG. 9 is a view corresponding to FIG. 5 for explaining the fifth embodiment of the present invention. In FIG. 9, elements corresponding to those shown in FIG. 5 are denoted by the same reference numerals, and redundant description is omitted.

[0068] In the fifth embodiment shown in FIG. 9, compared to the first embodiment, while maintaining the feature that the intersecting portion forms a T-shaped intersecting portion 19, the vertical bank 16 The position in the printing direction has been changed. As a result, the cells 17 are not necessarily arranged in the direction perpendicular to the printing direction. The other features of the first embodiment are also provided in the fifth embodiment.

[0069] FIG. 10 is a diagram corresponding to FIG. 5 for describing a sixth embodiment of the present invention. In FIG. 10, elements corresponding to those shown in FIG. 5 are given the same reference numerals, and redundant description is omitted.

In the sixth embodiment shown in FIG. 10, as in the case of the fifth embodiment, it is suspended in the printing direction. Regarding the straight direction, the cells 17 are not arranged side by side but are arranged in a zigzag shape.

In the sixth embodiment, with respect to the notch provided in the vertical bank 16, the notch 18 provided so as to be positioned between one end of the vertical bank 16 and the printing bank 15 is provided. In addition, it also has a notch 18a provided so as to be located in the center between adjacent banks 15 in the printing direction.

[0072] Other features of the first embodiment include the sixth embodiment.

FIG. 11 is a diagram corresponding to FIG. 4 for explaining the seventh embodiment of the present invention. Figure

In FIG. 11, elements corresponding to those shown in FIG. 4 are denoted by the same reference numerals, and redundant description is omitted.

In the seventh embodiment shown in FIG. 11, the intersections located at the center of the image line part 13 are all T-shaped intersections, but are located at the peripheral part of the image line part 13. This is characterized by the fact that a part of the intersection is a cross intersection 29. This means that it is important that a T-shaped intersection 19 is provided at the center of the image area 13.

[0075] It is most preferable that all of the intersecting portions located in the center of the image line portion 13 are T-shaped intersecting portions 19, but a cross-intersecting portion may be formed in part. Thus, when the τ-shaped intersection and the cross-shaped intersection are mixed, it is preferable that more than half are T-shaped intersections.

[0076] Also in the seventh embodiment described above, the other features are the same as those in the first embodiment.

[0077] While the present invention has been described with reference to the illustrated embodiment, various other modifications are possible within the scope of the present invention.

For example, in the illustrated embodiment, the image line portion 13 has a shape of the image line portion according to the pattern of the conductive paste film 9 to be formed by force daravia printing whose shape is rectangular. It can be changed arbitrarily.

[0079] In the illustrated embodiment, the printing sheet 3 is a ceramic green sheet 8 backed by a carrier film 10, and the conductive paste film 9 is a ceramic green sheet.

8 Force formed on top The conductive paste film 9 may be formed on the resin sheet. In this case, the conductive paste film 9 formed on the resin sheet is transferred onto the ceramic green sheet 8 in a subsequent process.

In the illustrated embodiment, the paste film formed by gravure printing is the conductive paste film 9, but it may be a paste-like film such as a ceramic slurry. More specifically, for example, a multilayer ceramic capacitor absorbs a step due to the thickness of the internal electrode, and therefore, a force that may form a step-absorbing ceramic layer in a region where the internal electrode is not formed. The present invention can also be applied to a case where a paste film such as a ceramic slurry to be formed is to be formed.

Claims

The scope of the claims

[1] A gravure printing machine for forming a paste film on a printing sheet by gravure printing,

An image line portion to which a printing paste for giving the paste film is applied is formed on the peripheral surface.

V, equipped with a gravure roll,

The image portion is provided with a printing direction bank extending substantially in the printing direction and a vertical bank extending substantially perpendicular to the printing direction bank, and is partitioned by the printing direction bank and the vertical direction bank. A plurality of cells are formed,

In order to establish communication between the cells adjacent in the printing direction, the vertical bank is provided with a notch,

The printing direction bank and the vertical direction bank form an intersecting portion intersecting each other, and the intersecting portion intersects the vertical direction bank in a T shape without penetrating the printing direction bank. Including T-shaped intersection,

Gravure printing machine.

[2] The gravure printing machine according to claim 1, wherein the T-shaped intersections are distributed at least in a central portion of the image line portion.

[3] The gravure printing machine according to claim 2, wherein more than half of the intersecting portions located at the center of the image line portion are the T-shaped intersecting portions.

[4] The gravure printing machine according to claim 3, wherein all of the intersecting portions located in a central portion of the image line portion are the T-shaped intersecting portions.

[5] The corner portion of the intersecting portion where the part in the printing direction bank and the part in the vertical direction bank intersect each other is rounded or chamfered by a slope. Gravure printing machine.

6. The gravure printing machine according to claim 1, wherein a gap between the notches is larger than a width of each of the printing direction bank and the vertical direction bank in a central part of the image line part.

[7] The gravure printing machine according to claim 1, wherein a direction force is applied to the notch, and a tip portion of the vertical bank is chamfered by roundness or a slope.

8. The gravure printing machine according to claim 1, wherein the printing direction bank is provided so as to extend substantially continuously from a printing start end to a printing end in the image line portion.

[9] The gravure printing machine according to claim 1, wherein the notches adjacent to each other in the printing direction have different positions in a direction perpendicular to the printing direction.

10. The gravure printing machine according to claim 9, wherein the notch is located at two corners facing each other in the diagonal direction of each cell.

[11] It is used for manufacturing a multilayer ceramic electronic component, and the paste layer is

2. The gravure printing machine according to claim 1, wherein the gravure printing machine is to be a patterned layer that forms a part of a multilayer structure provided in the multilayer ceramic electronic component.

[12] A method for producing a multilayer ceramic electronic component, which is carried out using the gravure printing machine according to claim 11.

13. The method for producing a multilayer ceramic electronic component according to claim 12, wherein a conductive paste is used as the printing paste, and the paste film is a conductive paste film serving as an internal electrode.

14. The method for producing a laminated ceramic electronic component according to claim 13, wherein the printed sheet is a ceramic green sheet.

15. The method for producing a multilayer ceramic electronic component according to claim 13, wherein the printing sheet is a resin sheet.